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Read Ahead Optimization ?

By cyberghost_1 ·
My OS is Win98SE, under the Performance Tab in System Properties, pertaining to File System. What is the best setting for the Slider for the Read Ahead Optimization? I have 64Mb RAM, this setting I believe is ti allocate the amount of RAM my PC uses to open programs and such. Since I don't have a lot of RAM, what is recommended? No Optimization or one of the other Settings, upt to 64Kb. Am I correct in the assumption that No Optimization will speed up my PC, since it won't be using Physical RAM to open Apps etc...?

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by tech_wiz03 In reply to Read Ahead Optimization ?

First of all, No optimization means that when a file or portion thereof is asked for Windows will read the file directly without caching any part of the file. The system will run faster as far as apps go because maximum memory is available instead of the cache using some percentage. The system will at times seem to run slower because actual disk access is used instead of cached info in memory. Another set of considerations are amount of virtual memory ( shud be 4 times 64mb = 256mb) and amount of [vcache] (windows defaults to 0bytes at start-up but can grow to 60% of memory.

With 64mb of memory:
Set readahead to 16kb, Set virtual memory to min and max of 256mb ( reduces fragmentation of drive) and set [vcache] in sys.ini to:
MinFileCache = 4096
MaxFileCache = 4096

Watch how much faster windows works!

regards
rick

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by tech_wiz03 In reply to

Am I correct in changing the VCache in Sys.ini using Msconfig?
No! In win98SE goto start->programs->accesories->systemtools->systeminformation then once there choose tools->systemconfiguration->sys.ini and scroll down past [383 enh] looking for [vcache] next choose Add and type exactly MinFileCache = 4096 then repeat Add and enter MaxFileCache = 4096 and remember to save the changes.

What are the recommended settings as far as performance is concerned? INFO: 700MHz Intel Celeron, 64Mb RAM, Win98SE, 20 GB. missing anything...
Best possible performance is found using a fixed swap (virtual space) set to 4 times total memory to a maximum of 511mb regardless of processor. Set Vcache Min = Max starting with 4096 kb and vary it up in 4096 KB steps until best performance achieved. Keep running tasks on rightside taskbar to a minimum as the more tasks are preloaded and running the less resource your pc will have.

I know this is an obselete PC, what ...
Relax, a PC only becomes obsolete when it can no longer fulfill the purpose(s) you need it for.
Regular defrags, purging of stuff in the internet-temp folder, & temp folder, clearing history, and clearing cached pages all contribute to faster browsing and prog execution. Free Ram XP helps to make more ram available (less it's own code) but tends to slow down the pc. Display res will affect overall performance if the display driver is not well suited to the system. loss of the 32bit option may be a result of choice of monitor, choice of videocard, or choice of driver. Since both pc's are supposed to be identical verify that you have made the same settings for both the video card, monitor, and driver inclusive of any MBO drivers.

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by cyberghost_1 In reply to

Poster rated this answer.

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by cyberghost_1 In reply to Read Ahead Optimization ?

Am I correct in changing the VCache in Sys.ini using Msconfig?

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by cyberghost_1 In reply to Read Ahead Optimization ?

What are the recommended settings as far as performance is concerned? INFO: 700MHz Intel Celeron, 64Mb RAM, Win98SE, 20 GB. missing anything...

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by cyberghost_1 In reply to Read Ahead Optimization ?

I know this is an obselete PC, what other recomendation are there to speed up performance, i.e...faster web page loading, faster loading of Apps, Progs, and Folders. I am using FREE RAM XP Pro v.1.40. Does my display resolution have anything to do with performance? I am using Intel Graphics Controller 82810E. 15 In. viewable Compaq monitor MV540. I set my display to 1024 x 768 Hi-Color (16-Bit.) I lowered it from 24-Bit. Last of all why doesn't my PC have 32-Bit as an option? I have 2 identicle PC's and this one is the only one with out 32-Bit...Any advise for this aswell would help...

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by cyberghost_1 In reply to Read Ahead Optimization ?

Point value changed by question poster.

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by TheChas In reply to Read Ahead Optimization ?

Got your message.

Since your goal is to improve performance, if at all possible add an additional 128MB of RAM.

Adding more RAM is your best option to improve overall performance.

Do not install more than 384MB total RAM on a Windows 9X system.

Next, in the performance section of Device Manager, set the system type to network server.
This makes many file operations run faster.

As to virtual memory, the only disagreement I have with the first answer is that I recommend NOT setting a maximum.
The 256MB minimum will help reduce fragmentation of both the page file, and system files.
Setting a fixed maximum for virtual memory can cause more system crashes.

It is now obsolete advice that virtual memory should be set to a fixed multiple of installed RAM.
Actually, the less physical RAM that you have, the more virtual memory you need.

As far as your original question on read ahead optimization, the amount needed depends on how much file transfer happens on the PC, and the size of the cache in your hard drive.
64K is only 0.1% of your system RAM.
Freeing up that small amount of RAM will not have a measurable impact on system performance.
However, not pre-fetching file data will slow down your system.

On the video issue, there are 2 possibilities here:

1. you do not have the correct video driver installed.
Download and install the latest driver for your video card.

2. You do not have enough video RAM to support 24 bit color.
If you have on-board video, there is a setting in BIOS settings for how much system RAM is available for the video system.
This would be another good reason to add more RAM to your system. With more system RAM, you can safely set aside more RAM for the video system.

Your system specifications suggest that this PC is at least 4 years old.
If so, you would likely get a significant performance improvement by performing a clean installation of Windows.

continued

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by TheChas In reply to

Depending on how often you install and remove software, a "typical" Windows 9X installation can slow down significantly over time.
Part of this is because the registry grows larger and larger.

Short of a clean installation of Windows, a registry maintenance program such as V-Com Fit-It, or Norton Win-Doctor can help improve performance.

Also, clean out your Internet cache (temporary internet files) and the C:\Windows\Temp folder.
Then, boot into safe mode and run defrag.

Finally, if you have not done so, download and run both AdAware www.lavasoft.de
and SpyBot Search and Destroy
I use the link at www.nonags.com

Your RAM manager could actually slow your system down.
I ran one on my W98 system for a while until I had time to re-install Windows.

There are a few Windows updates that have serious negative impacts on many W98 systems:
IE 6
DirectX 9
Media Player 9
All should NOT be installed unless your video driver specifically supports DirectX 9.
(check the readme file on the manufactures download page)

Setting your video resolution and color depth to lower settings will make the PC run faster as it will have less data to process for the display.

Best wishes,
Chas

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by cyberghost_1 In reply to

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